The new international standard analog current transmitter output value of 4 ~ 20mA two-wire loop to send data and control standard that is easy to accept the instruction of some of the actuators in the process of a wide range of applications. Application and Principle: power transmitter is a measurement of the parameters (AC current, AC voltage, active power, reactive power, active power, reactive power, frequency, phase, power factor, DC voltage, DC current, etc.) linearly proportional to convert the DC current or voltage (pulse output) of the measuring instruments. It is widely used in electrical measurement, automatic control and scheduling system, electricity, petroleum, coal, metallurgy, railway, municipal and other departments. The new international standard analog current transmitter output value of 4 ~ 20mA two-wire loop to send data and control standard that is easy to accept the instruction of some of the actuators in the process of a wide range of applications. The international community has an analog current signal only standard telemetry. Two wires in the current telemetry circuit, transmitter power and showing the reading device, including any other resistive sensors and send the power supply wires are connected in series in the loop. The main technical indicators rated loop current DC4-20mA (static, full-way adjustable) Rated control terminal voltage DC0-5V ± 10% (static, full-way adjustable) rated working voltage of + 24V ± 20% of rated input current ≤ control terminal 100uA rated power consumption of static 4mA, dynamic time equal to the loop current of 20mA nonlinear distortion 0.1% FS rated output current drift ≤50ppm / ℃ static zero level (4mA) adjustment range: 4mA ± 25% (3mA-5mA) The minimum operating voltage> 15V operating voltage limit ≤35V rated output overcurrent protection limits restrict internal 25mA + 10% two-wire port connected to the wrong protection reverse power protection (requires external 1N4007 diode) Operating temperature -40 ℃ -80 ℃ Storage temperature - 50 ℃ -100 ℃ two-wire port transient lightning current and surge suppression protection TVS TVS inhibit the impact of current 35A / 20ms / 1.5KW; (need external 1.5KE35CA TVS Diodes)